When it is considered that the purposed object of book-binding is to preserve in a shape at once attractive and permanent, the best and noblest thoughts of man, it rises to a high rank among the arts. Side by side with printing, it strives after that perfection which shall ensure the perpetuity of human thought. Thus a book, clothed in morocco, is not a mere piece of mechanism, but a vehicle in which the intellectual life of writers no longer on earth is transmitted from age to age. And it is the art of book-binding which renders libraries possible. What the author, the printer, and the binder create, the library takes charge of and preserves. It is thus that the material and the practical link themselves indissolubly with the ideal. And the ideal of every true librarian should be so to care for the embodiments of intelligence entrusted to his guardianship, that they may become in the highest degree useful to mankind. In this sense, the care bestowed upon thorough and enduring binding can hardly be overrated, since the life of the book depends upon it. CHAPTER 4. PREPARATION FOR THE SHELVES: BOOK PLATES, ETC. When any lot of books is acquired, whether by purchase from book-dealers or from auction, or by presentation, the first step to be taken, after seeing that they agree with the bill, and have been collated, in accordance with methods elsewhere given, should be to stamp and label each volume, as the property of the library. These two processes are quite distinct, and may be performed by one or two persons, according to convenience, or to the library force employed. The stamp may be the ordinary rubber one, inked by striking on a pad, and ink of any color may be used, although black or blue ink has the neatest appearance. The stamp should bear the name of the library, in clear, legible, plain type, with year of acquisition of the book in the centre, followed by the month and day if desired. A more permanent kind of stamp is the embossing stamp, which is a steel die, the letters cut in relief, but it is very expensive and slow, requiring the leaf to be inserted between the two parts of the stamp, though the impression, once made, is practically indelible.